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Expired European patentEurope

Process of forming super high-contrast negative images and silver halide photographic material and developer being used therefor

EP 0694808 B1 · Applicant: DAINIPPON INK AND CHEMICALS, INC.

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed July 26, 1995 and granted December 5, 2001. A European patent lasts at most 20 years from filing, so its term ended July 26, 2015.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by January 26, 2021.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJuly 26, 1995
PublishedJanuary 31, 1996
GrantedDecember 5, 2001
Term endedJuly 26, 2015
Application numberEP 95111772
Classification (CPC)G03C5/305 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJuly 26, 1995PublishedJan 31, 1996Patent grantedDec 5, 2001Term endedJuly 26, 2015

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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